Aquarium tank



FIG. 1 is a top and right front perspective view of an aquarium tank, showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof;

FIG. 8 is a cross-sectional view taken along line 8--8 in FIG. 2; and,

FIG. 9 is a cross-sectional view taken along line 9--9 in FIG. 2. 

The ornamental design for an aquarium tank, as shown and described. 